<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>左侧固定，右侧弹性</title>
	<style>
		* {
			margin: 0;
			padding: 0;
		}

		html,body {
			height: 100%;
		}

		body {
			min-width: 405px;
		}

		.left {
		
			width: 200px;
			height:100%;
			position: absolute;
			background-color: #456;
		}

		.right {
			height:100%;
			margin-left: 200px;
			background-color: #abc;

		}
	</style>
	<script>
</script>
</head>
<body>
	<div class="left">
		左边
	</div>
	<div class="right">
		右边
	</div>
</body>
</html>